Google AdSense is a program run by Google through which website publishers serve advertisements that are targeted to the site content and audience.
Modernizr is a JavaScript library that detects the features available in a user's browser.
Nginx is a web server that can also be used as a reverse proxy, load balancer, mail proxy and HTTP cache.
Prototype is a JavaScript Framework that aims to ease development of web applications.
VK is a Russian online social media and social networking service.